Train control.



J. B. & W. L. WILLIAMS. TRAIN CONTROL. APPLICATION FILED 131511.23. 191s,

l 075,133. Patented Oct. T, 1913. 9 .2 SHEETS-SHEIII AI l J. E.' n W. L. WILLIAMS. TRAIN CONTROL.

APPLICATION FILED APB.23, 1913.

2 SHEETS-SHEET 2.

JAMES E. WILLIAMS ANI) WILIAM, WLLLIAMS, OE WILLIM-ANTIG, CONNECTICUT.

TRAIN vcourle Speccation of Letters Eatent.

atented Ofct. 7, 1,913.

Application filed April 23', 1913. Serial Ho. 763,048.

To all/07mm t may concern Be it known that we, JAMES E. WILLIAMS and VILLIAM L. W'rLLIAMs, citizens of the.

tems, and the object is to providejmea-ns whereby upon any reduction of pressure in the brake pipe the flow of the iuidbr air will `be cut olf between the slide-valve feed valve and the engineer-s brake valve.

ln double heading; that is, where two engines are connected together, it is necessary tocut out one of the nengines from the air system, and the engineer of -thelpilot or head engine has control of, the` braking system.

With' this device, either engineer, that is,

the engineer of the pilot engine or the secondengine, .can havecontrol over the braking system, and in ca se one engineer sets the brakes or causes a reduction of pressure 1n the brake pipe, the controlling device,.which consists of a valve, will close the air passage between the feed valve and the engineers brake valve on each engine, and cause the brakesto remain set, and. this valve device will remain' in the: position for cutting olf the flow of fluid from` the feed valve to.

the brake valve until the engineer of one of the engines throws his handle or lever of the brake valve to release position, when the air system will be replenished and the valve will be caused, by the increase of pressure to the brake pipe, to be moved out of the path of the conduit or passage between the feed valve and the engineers valve. engineer can apply the brakes and either engineer can cause the brakes to'be released by throwing his handle or lever to a release position, this, of course, being governed by the position of the engineers brake handle when the brakes are set. For .in-

stance, if the brakes were set by the engineer on the pilot engine, the brake lever or handle of the engineer on the second engme would be' in running position, and it would therefore be necessary for the engi- 'neerqon the second engine, before releasing the brakes, to throw his lever to release position to cause the valve to be released -a'ndn'ausedf to'move from the passage be' From this it will be seen that either isconn'ected'to a passage 5 lead-ing .thi-'ou h the. engineers brake, valve,Y Vand which is in tween the feed valve and engineers brake valve. t v

Another advantage is in case of a break in the train line, vsuch as the breaking of a 60 hose, the valve will automatically move to a position for preventing the flow of the fiuid from the feed valve to the engineers brake valve, Yand will thereby prevent the main reservoirgpressure from escaping to atmosphere, and the engineer willnot be required to move his lever or handle to lap position.

Another advantage or application of this device is: With a train control wherein' an air pipe is connectedl to the chamber of the engineers valve above the equalizing piston and said pipe is connected with a valve trip device, which trip device is adapted to strike `fobstructions in case an engineer should pass a signal indicating a stop', the

valve would, in this instance, upon the netuation of the trip, which would cause a reduction of pressure in the brake pipe, move to a 'position for shutting olf the How of the iiuidor air between the feed valve and brake valve.

The invention consists of certain novel features of construction and combinations of parts which will be hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure l is a longitudinal vertical sectional view showing theinvention applied betweenthe engineers brake valve and a slide-valve feed valve; Fig. 2'is a top plan view thereof; Fig. 3 is an enlarged vertical sectional view of the invention.; and Fig. 4 is arcrosssectional view.

A represents the engineers brake valve, and B the slide-valve feed valve.

C represents the casing of the controlling device, which .is mounted` and supported preferably between the engineers brake valve and the feed valve. The easing C has two longitudinal openings or passages l and 2 therein, which passages are in registry with the passage of the feed valve and engineers brake valve. the passage 1 registering with the passage 8, through which the fluid from. theV main reservoir flows. The main reservoir is not disclosed, but is connected to the-engineers brake valve by aV suitable connection with, the pipel 4, The passage 2 communication thefibrierpipe. f (i, .A

1o tionl chamber is formed in the brake valve, in which is located an equalizing piston 7.

The details of construction and the location o'tparts oit the engineers brake valve 5 and the 'feed vvalve B do not torni any part of the invention, but they are of the type adopted and used on the 1Westinghouse air brake' systems, and it is the intention that they be used in connection with this invern Y y A piston chamber 8 .is formed in the casfing, and mounted therein is a piston 9. The 4on 9, is providedwvith a lstem 10, upon vi chf is loosely mounted a slide valve 11.

nfivhich is mounted a' pin 13, which pin onnected to the `stem 10, and when the ston 1s on. its seat-14the pin closes the lopea along one side thereof, and is adapt- I be brought-'into registry with aport 15 "-f in -fhe valve chamber 16. A spring 17 is 'connected to the valve 11 for normally holding the valve against the Wall of. the valve sage 2 and the valveport 23 extends-'through the passage 1. Valves 24C and 25 are connected to the piston 9, and are received 'in the ports 22 and 23. These valves are nor- 40 mally out of thefpassages 1 a'nd 2, but upon the' reduction ot pressure in the brake pipe,

these valves are caused to move, whereby the passages 1 and 2v are closed by the valves 24 and 25.

Assuming that there has been a` reduction in the pressure in the brake pipe caused by the application vneer, ory by an ,engineer .of the double header, a break in the train pipe,'or. by-,the action of the tripping lever. 26, which is-connected to a pipe 27, which pipe is connected with' the chamber D of the engineers brake valve, there would be a reduction of the pressure in the chamber 8 as the air would be drawn l' port 20 and pipe 21. The pressure in the valve'chamber is now greater than the pressure in the 'valve chamber 8, althoughunder normal conditions the pressures are equ'al. .The air pressure' in the auxiliary reservoir E Will cause the piston 9 to move in the valve chamber 8, causing the valves 24 and -25 to close the passages 1 and 2, thereby shutting ott the flow ofthe fluid between the sa'feed valve and the engineers slide valve is provided with a passage Avvill soon be less than as'fsage or conduit 12. -T-he passage-12 is4 I ggqvglchamber... v An auxiliary reservoir E is conot the brakes by the engi-- from the piston chamber 8 through theV made' in l the 0 .several "parts described Without departing brake valve.

its the piston 9 moves upwardly, it withdraws the vpin 13 from its seat in the passage or comluit 12, thereby allowing the air in the valve chamber to escape to the. atmos- ,phere through the port 15. This movement of the piston 9, which has suitable packing therearound for forming a'tight tit within the wall et the piston chamber 8, causes the shoulder 39 on the end of the piston 10 to engagev the valve 11 and carry the valve with it. The valve passage 12 continues to be open to the' atmosphere, andthe valves 24 and 25 on the piston 9 will close the passages 1 and 2 from the slide valve feed valve, and the pressure below the piston line the pressure above the piston. This reduction in pressure below the piston 9 will cause the piston to move downward sufficiently to permit pin 13'to close the passage 12, without vvithdraiving the valves 24 and 25 from the passages 1 and 2. The pressure upon the closing of the' passage 1,2 will be equal on both sides of the piston and the pist-en will not move farther until there is an increase of pressure in the brake pipe. Upon' the throwing of the engineers lever to a "re lease position, the pressure in the brake pipe is again replenished, and the air pres.- sure4 will flow from the brake pipe'through the pipe 21 to the chamber S, forcing the' piston on to its seat, the air passing around the piston and into the valve chamber 16 and replenishing the auxiliary reservoir E until the pressures on opposite sides of the piston are equal. In ease the vtrain line should b rake, the valves 24 and 25 would again beactuated in the same manner as above stated, and would prevent the air escaping from the main reservoir Without the necessity of the engineer placing his lever or handle in lap position, which l is now customary and necessary to 'retain-` the air in the main reservoir.

On some air brake equipments, for instance, E. T. equipments, the slide-valve feed valve is not connected directly tothe engineers I nected together by means of piping, and it would not therefore be necessary that the feed valve and engineers valve be connected together to make this invention applicable to them; in other words, they need not be connected together as shown 1n Fig. 1, but can be connected ltogether by suitable piping, such as is'used, for instance, in the E. T. equipment.

1t is evident that slightchanges might be form and arrangement of the from the spirit and sco e of the invention, and hence yit is not deslred to ,limit the invention to theexact construction herein-set fort-h, but :--.f

Having fully described our invention,

brake valve, but they are' conletales and desire to secure 'nation with an engineers brake valve -and a feed -Valve, of a Valve 'for controlling the communication" betweenthe brake Valve and feed valve, and means for closing said valve to be actuatedupon the reduction in brake ipe Ipressure for closing said communication.

3. In an automatic -air brake, the combination with anengineers brake valve and 'a feed valve, of a valve for `controlling the communication between the brake valve and feed valve, and means for closing saidvvalve to bel actuated upon the reduction in brake pipe pressure for closing said communication, said means operating upon the recharging of brake pipe pressure for actuating said i valve to open communication between the brake valve and feed valve..

4. In an automatic air brake, the combination with a brake valve and a feed valve,

p of a valve for controlling the communication between the brake valve and feed valve,

ba piston connected to said valve adapted to be actuated upon the reduction in brake pipe pressure for operating the valve for closing said communication between the feed valve and brake valve.

5. In an automatic air brake, the combi nation with an engineers brake valve and a feed vaive7 of a Valve casing located between said brake valve and feed valve and in communication therewith, valves in said casing for closing the communication between the brake Valve and feed valve, a piston chamber and a valve chamber in said casing, a piston mounted in said piston4 chamber and connectedy to the Valves, means for connecting the piston chamber to the brake pipe of the engineer-s brake valve whereby upon the reduction of brake pipe pressure, the pressure in the piston chamber will be reduced and the piston caused to move by the pressure exerted from the valve chamber .for causing the Valves to close communication between the brake valve and feed valve, and a valve actuated by said piston in the valve chamber for permitting the air pressure in said valve chamber to escape to atmosphere.

In testimony whereof we aiiX our signatures, in the presence of two witnesses.

JAMES E. WILLIAMS. WILLIAM L. WILLIAMS. Witnesses:

ALICE D..ST0UGHT0N, GEORGE E. HINMAN. 

